Uranium separation material and preparation method thereof

A technology of silica and structural formula, applied in the field of separable uranium materials and their preparation, can solve the problem of low chemical stability and the like, and achieve the effect of high adsorption capacity

Active Publication Date: 2021-02-26
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many disadvantages in organic anion exchange resins:
[0010] (1) The chemical stability is not high;

Method used

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  • Uranium separation material and preparation method thereof
  • Uranium separation material and preparation method thereof
  • Uranium separation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050]The present invention is illustrated below in conjunction with examples.

[0051] 1. Preparation of materials

[0052] (1) Preparation of quaternary ammonium salt grafted silica material

[0053] The chemical reaction formula of quaternary ammonium salt grafted silicon dioxide of the present invention is shown in formula III,

[0054]

[0055] Concrete preparation process is as follows:

[0056] (1) Synthesis of intermediates: 5g of silica (200-300 mesh), 6.13g of 3-aminopropyltriethoxysilane, the solvent is tetrahydrofuran, heated to reflux at 66°C for 24h, the product is washed with water and ethanol three times Then dry.

[0057] (2) Synthesis of quaternary ammonium salt grafted silica (200-300 mesh): 5g intermediate, 11.42g 1-chlorobutane, solvent is toluene, heated and refluxed at 70°C for 72h, the product is washed three times with water and ethanol Then dry.

[0058] The prepared material structure is characterized by technical means such as infrared spect...

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Abstract

The invention discloses a material for separating uranium from alkaline nuclear industry low-level radioactive wastewater and seawater and a preparation method of the material. The material for separating uranium is quaternary ammonium salt or quaternary phosphonium salt grafted silicon dioxide. The material can form stable covalent bonds with organic functional groups; the balance time is moderate, and the balance of surface activation can be achieved within multiple hours; the material is a high-specific-surface-area matrix material and is low in cost; silicon has a high-quality exchange characteristic and does not expand; and the material has the advantages of good organic solvent resistance and very high thermal resistance.

Description

technical field [0001] The present invention relates to a material capable of separating uranium and a preparation method thereof. Specifically, the present invention relates to a material capable of separating uranium from alkaline nuclear industry low-level waste water and seawater and a preparation method of the material. Background technique [0002] With the rapid development of the nuclear industry, nuclear-related enterprises have produced a large amount of radioactive wastewater. In order to prevent environmental pollution caused by the migration of radionuclides, the radioactive wastewater must be treated to reduce the possibility of harm [1]. [0003] Wastewater from the nuclear industry is a kind of high-salinity low-level radioactive wastewater. When pH>8, uranium is mainly [UO 2 (CO 3 ) 3 ] 4- form, the coexisting anions are mainly NO 3 - , SO 4 2- , CO 3 2- , F - , Cl - 、HCO 3 2- , TcO 4 - . In the past few decades, a variety of uranium separ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30G21F9/00
CPCB01J20/22B01J20/103G21F9/007B01J2220/46Y02P10/20
Inventor 沈颖林李晓敏
Owner LANZHOU UNIVERSITY
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